Date: Fri, 7 May 2010 00:27:33 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: stainless steel coolant pipes
In-Reply-To: <m2k67f8ac6c1005061012r9b9bb955mecedd6157170551a@mail.gmail.com>
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Those filter actually release additives to eliminate cylinder cavitation
erosion.
What happens to diesels the air bubbles that form from oxygen in the coolant
break from the knocking of the Diesel combustion process. As those bubbles
break they take some metal from the cylinder wall with. Eventually you a
hole in the side of the Cylinder. Ford had to learn this the hard way with
the Early Power stroke.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Gary Bawden
Sent: Thursday, May 06, 2010 1:13 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: stainless steel coolant pipes
This issue keeps coming up - - why not just install a coolant filter
as used on commercial and industrial engines, they contain a
sacrificial anode (magnesium, I think). Can't hurt, might give a
feeling of reassurance to those who imagine their coolant passages,
radiators, etc., rotting away mile by mile. :^)
Gary
>
> Date: Thu, 6 May 2010 06:08:21 -0700
> From: Don Hanson <dhanson928@GMAIL.COM>
> Subject: Re: stainless steel coolant pipes
>
> On Thu, May 6, 2010 at 4:35 AM, Andrew Grebneff <goose1047@gmail.com>
wrote:
>
>> On Thu, May 6, 2010 at 11:25 PM, Ken Wilford <kenwilfy@comcast.net>
wrote:
>>
>> > OK, let's think about this in a logical manner. The original 1.9l
>> Vanagons
>> > had plain steel pipes. The piston liners inside the engine are cast
>> > iron
>> > with steel studs holding the heads on. Any way you look at it the van
>> > is
>> a
>> > multi-metal soup.
>> >
>>
>> ...hence the head-corrosion problem?
>>
>> I guess it doesn't really make any difference which antifreeze you use,
so
>> long as you actually use the stuff.
>>
>> --
>> Regards
>> Andrew Grebneff
>>
>
> That is exactly why the heads do leak on this era German water-pumper
> engines.. Heat+ dissimilar metals+a conductive solution to connect it all
> together=a recipe for corrosion. The 993 Porsche motors have the same
> problems as a WBX. Change away with your antifreeze/coolant mix...your
> motor is still attacking itself.still it is probably the best thing to
keep
> the fresh coolant in there.
>
> I wonder if anyone has ever experimented with installing sacrificial
> anodes like are used in the marine world? A couple of small bits of zinc
> somewhere accessible in the coolant circulation system might mitigate the
> corrosion problems you WBX owners encounter in the head area?
>
> Don Hanson
>
> ------------------------------
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